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Kling 4.0 AI Video Generator
Turn a script, a photo or a reference clip into cinematic 4K footage of up to 30 seconds — the Kling 4.0 AI Video Generator keeps voice and picture in sync.
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A Closer Look at the Kling 4.0 AI Video Generator
Developed by Kuaishou, this model converts scripts, photographs and uploaded reference material into completed footage. Its Omni Reference engine treats sight and sound as one input, so dialogue stays aligned with the action no matter which language is spoken.
- All-in-One Reference InputsStills, video, voice samples and character elements combine freely inside Omni Reference, capped at 15 items across a single project.
- Synced Dialogue in Any LanguageEvery spoken line lands exactly on cue, while two-channel stereo separates each character's voice so listeners can tell who is talking.
- Clips From 3 to 30 SecondsOne render delivers anywhere from three to thirty seconds. Need more? Extra length is generated as a separate extension pass rather than folded into the original job.
Three Steps from Reference to Finished Clip
Follow three short moves to turn raw references into a reviewed, export-ready clip with Kling 4.0.
What the Kling 4.0 AI Video Generator Can Do
Longer runtimes, stacked reference layers and language-aware control over both sound and image — every one of them built into the Kling 4.0 AI Video Generator.
Runs Up to 30 Seconds
One render can last half a minute, enough space for an opening, a turn in the middle and a proper ending.
720p, 1080p or 4K Delivery
Choose 720p, 1080p or 4K, then frame for wherever it lands: 21:9, 16:9, 1:1, 9:16 or Auto takes you from vertical social cuts to widescreen product films.
15 Omni Reference Slots
Blend images, video, voice samples and character elements inside a single pool of 15 — say 10 photos, or 5 clips totalling 30 seconds, or 7 subjects.
Voice References in Any Language
Upload a voice sample to shape how a speaker sounds; the picture and stereo mix remain locked together whatever language is used.
10 Keyframe Control Points
Pin down the moments that matter with up to 10 still keyframes, directing a character's appearance, the timing of scene changes and how the shot begins and ends.
Precision Clip Editing
Adjust expressions, movement, environment or style by supplying up to 5 clips — one serving as the main take — each between 3 and 30 seconds and 30 seconds combined at most.
Answers About the Kling 4.0 AI Video Generator
Common questions on clip length, output quality, reference limits, editing, credits and API access for Kling 4.0.
Which clip lengths, resolutions and aspect ratios can I choose?
Renders span three to thirty seconds, delivered at 720p, 1080p or 4K. HDR is set separately from resolution, so check what your final delivery spec actually calls for.
What is the maximum number of Omni Reference assets?
The cap is 15 items in total, and images, video, voice samples and character elements all come out of that same pool. Per-category limits are not additive, so you cannot stack them.
Are voice references included in the 15-asset cap?
Yes — they come out of the same pool of 15. Sound and image stay aligned in every language, so listen back to each line once the render finishes.
How does the targeted editing feature operate?
Supply up to 5 clips, one of them designated as the main take. Each has to sit between 3 and 30 seconds, and the combined total cannot pass 30. Then state which expression, movement, environment or style should change.
How does Kling 4.0 stack up against Kling 3.0 and Seedance 2.5?
Compare runtime, output quality, accepted input types and the level of control each one gives you. Kling 4.0 doubles the ceiling of Kling 3.0 at thirty seconds, and brings ten keyframes along with fifteen Omni Reference slots.
What credits are required, and is an API available?
Any credits already sitting in your Kling Motion Control account work here, and the figure on the generate button updates as you change settings. Web access does not guarantee an API — confirm model IDs, accepted inputs and billing with your provider.
Put the Kling 4.0 AI Video Generator to Work
Your existing Kling Motion Control credits transfer without any extra step. Review the cost shown before generating, and keep the prompts that produced your best results.